Evaluation of the Degradation of Fiber Composites by Integrated Structural Health Monitoring

通过综合结构健康监测评估纤维复合材料的降解

基本信息

项目摘要

The degradation of fiber-reinforced polymers due to cyclic loading is associated with micro defects in the material. Within this project, the implications of micro defects on the propagation of Lamb waves will be investigated. The first objective is to capture qualitatively the effects of micro defects, which are characteristic for fiber-reinforced plastics but not relevant to immediate failure, and the related material degradation on the characteristic properties of Lamb waves. The experimental investigations will analyze the degradation influence on characteristic parameters of the linear wave theory, such as the group velocity, and include the non-linear defect behavior, which is caused e.g. by the interaction of crack surfaces and which may be described by the acoustic nonlinear parameter. It is assumed that reference measurements from undamaged specimens have to be available. The second, far-reaching objective aims at the quantification of these effects. The related experiments address the question whether the extent of the degradation and thus the extent of the damage can be assessed by changes of those parameters, which describe the propagation behavior of Lamb waves.
纤维增强聚合物在循环载荷作用下的降解与材料中的微观缺陷有关。在这个项目中,微观缺陷对兰姆波传播的影响将被调查。第一个目标是捕获定性的微观缺陷,这是纤维增强塑料的特性,但不相关的即时故障,以及相关的材料退化的特征性质的兰姆波的影响。实验研究将分析退化对线性波理论的特征参数(例如群速度)的影响,并且包括例如由裂纹表面的相互作用引起的并且可以由声学非线性参数描述的非线性缺陷行为。假设必须提供未受损试样的参考测量值。第二个意义深远的目标是量化这些影响。相关的实验解决的问题,是否可以通过这些参数的变化,描述的传播行为的兰姆波的退化的程度,从而评估的损害程度。

项目成果

期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Numerical simulation of elastic wave propagation in isotropic media considering material and geometrical nonlinearities
  • DOI:
    10.1088/0964-1726/24/4/045027
  • 发表时间:
    2015-04
  • 期刊:
  • 影响因子:
    4.1
  • 作者:
    N. Rauter;R. Lammering
  • 通讯作者:
    N. Rauter;R. Lammering
A constitutive model for the analysis of second harmonic Lamb waves in unidirectional composites
Impact Damage Detection in Composite Structures Considering Nonlinear Lamb Wave Propagation
On the detection of fatigue damage in composites by use of second harmonic guided waves
  • DOI:
    10.1016/j.compstruct.2016.05.049
  • 发表时间:
    2016-09-15
  • 期刊:
  • 影响因子:
    6.3
  • 作者:
    Rauter, Natalie;Lammering, Rolf;Kuehnrich, Tim
  • 通讯作者:
    Kuehnrich, Tim
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Professor Dr.-Ing. Rolf Lammering其他文献

Professor Dr.-Ing. Rolf Lammering的其他文献

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{{ truncateString('Professor Dr.-Ing. Rolf Lammering', 18)}}的其他基金

Prozessgerechte Auslegung von funktionsintegrierten Vorschubeinheiten auf der Grundlage von nachgiebigen Mechanismen
基于灵活机制的功能集成进料单元的工艺适当设计
  • 批准号:
    172925655
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Qualification of function integrated feed units on the basis of compliant mechanisms in small machine tools for small work pieces
小型工件小型机床中基于顺应机构的功能集成进给单元的鉴定
  • 批准号:
    172887528
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Analyse der Ausbreitung von Lambwellen in Faserverbunden mit örtlichen Defekten unter komplexen Umgebungsbedingungen in Faserverbunden
纤维复合材料复杂环境条件下兰姆波在具有局部缺陷的纤维复合材料中的传播分析
  • 批准号:
    84621171
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Detektion von Schädigungen in Flächentragwerken durch Analyse der Wellenausbreitung
通过分析波传播检测拉伸结构的损伤
  • 批准号:
    30102448
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Die Anwendung der Dämpfung pseudoelastischer Formgedächtnislegierungen in adaptiven Struktursystemen
阻尼拟弹性形状记忆合金在自适应结构系统中的应用
  • 批准号:
    5284668
  • 财政年份:
    2001
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Dynamisches Verhalten von Gleis und Untergrund bei geschädigtem Oberbau unter besonderer Berücksichtigung lateraler Kräfte
上部结构损坏时轨道和地基的动态行为,特别考虑侧向力
  • 批准号:
    5100752
  • 财政年份:
    1998
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes

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